問題出沒注意!!! Chem 3

First of all, let's have a view of what other properties (besides acidic property) do those acids have in addition:
Conc. H2SO4: Dehydrating (脫水), Oxidizing (氧化) and Involatility (非揮發性)
Conc. HNO3: Oxidizing (even stronger than conc. H2SO4)
Dil. HNO3: Oxidizing (weaker than conc. H2SO4)
And for the remaining acids (Conc. HCl, dil. H2SO4 and dil. HCl), they are for sure be not as corrosive as the 3 acids above since they only have acidity as their properties.
Therefore, for these 3 acids, only acidity has to be counted and hence the corrosive power is:
Dil. HCl < Dil. H2SO4 < Conc. HCl (which is the order of concentration of H+ ions in them.)
And for the other more corrosive acids, conc. H2SO4 is for sure to be the most corrosive owing to more properties of it. Say if spilt on human skin, the skin tissues will be oxidized and dehydrated, leaving a black residue (which is mainly composed of carbon).
Then for oxidizing power, conc. HNO3 > dil. HNO3.
So the whole ascending order of corrodibility is:
conc. H2SO4 > conc. HNO3 > dil. HNO3 > conc. HCl > dil. H2SO4 > dil. HCl